Toros I^[1] (Armenian:Թորոս Ա), alsoThoros I,^[2][3] (unknown^{[citation needed]} – 1129^[1] / February 17, 1129 – February 16, 1130^{[citation needed]}) was the thirdlord of Armenian Cilicia^[1] (c. 1100[1] / 1102 / 1103^{[citation needed]} – 1129^[1] / 1130^{[citation needed]}).

Toros was the elder son ofConstantine I, lord of Armenian Cilicia.^[4]

In 1107,^[1] encouraged byTancred, Prince of Antioch, Toros followed the course of thePyramus River (today the riverCeyhan in Turkey), and seized the strongholds ofAnazarbus (a place which had been considered impregnable) andSis (ancient city).^[5] Toros extensively rebuilt the fortifications at both fortresses with tall circuit walls and massive round towers.^[6] A beautifully executed dedicatory inscription on the church (dated ca. A.D.1111) records his triumph, and most importantly, traces his Rubenid genealogy.^[7][8]

In 1111,Sultan Malik Shah ofKonya entered Armenian territories.Levon saved theArmenian Kingdom of Cilicia into falling in the hands of the Turks.^[1]

His death occurred during 1129.^[1]

The name of Toros's wife is not known.^{[citation needed]}

• Constantine II of Cilicia (? – after February 17, 1129)^{[citation needed]}
• (?) Oshin (? – after February 17, 1129)^{[citation needed]}

• Siege of Zovk

• Edwards, Robert W.:The Fortifications of Armenian Cilicia: Dumbarton Oaks Studies XXIII; Dumbarton Oaks, Trustees for Harvard University, 1987, Washington, D.C.;ISBN 0-88402-163-7
• Edwards, Robert W.: “Ecclesiastical Architecture in the Fortifications of Armenian Cilicia: First Report,”Dumbarton Oaks Papers vol. 36; Dumbarton Oaks, Trustees for Harvard University, 1982, Washington, D.C.;ISBN 0-88402-114-9
• Edwards, Robert W.: “Ecclesiastical Architecture in the Fortifications of Armenian Cilicia: Second Report,”Dumbarton Oaks Papers vol. 37; Dumbarton Oaks, Trustees for Harvard University, 1983, Washington, D.C.;ISBN 0-88402-121-1
• Ghazarian, Jacob G. (2018).The Armenian Kingdom in Cilicia during the Crusades: The Integration of Cilician Armenians with the Latins (1080–1093). Taylor & Francis.
• Runciman, Steven (1952).A History of the Crusades, Volume II: The Kingdom of Jerusalem and the Frankish East. Cambridge: Cambridge University Press.

• Armenian History page on Cilicia
• Armenian History page on Thorus I
• "Cilicia" .Encyclopædia Britannica. Vol. 6 (11th ed.). 1911. pp. 365–366.
• Armenian History page on Cilician history^{[permanent dead link]}
• The Barony of Cilician Armenia (Kurkjian's History of Armenia, Ch. 27)
• Smbat Sparapet's Chronicle

• 12th-century deaths
• 12th-century Armenian people
• Monarchs of the Rubenid dynasty
• 12th-century rulers of Armenian Cilicia

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• Year of birth unknown